There was Baghdad in the aftermath of the US invasion – a frenzy of arson and looting that emptied libraries and museums. The factories got hit too. In 2004 I visited one that used to make refrigerators. Its workers had stripped it of everything valuable, then torched it so thoroughly that the warehouse was a sculpture of buckled sheet metal.

Back then the people on cable news thought looting was highly political. They said this is what happens when a regime has no legitimacy in the eyes of the people. After watching for so long as Saddam Hussein and his sons helped themselves to whatever and whomever they wanted, many regular Iraqis felt they had earned the right to take a few things for themselves. But London isn't Baghdad, and the British prime minister, David Cameron, is hardly Saddam, so surely there is nothing to learn there.

Back then the people on cable news thought looting was highly political. They said this is what happens when a regime has no legitimacy in the eyes of the people. After watching for so long as Saddam Hussein and his sons helped themselves to whatever and whomever they wanted, many regular Iraqis felt they had earned the right to take a few things for themselves. But London isn't Baghdad, and the British prime minister, David Cameron, is hardly Saddam, so surely there is nothing to learn there.

Argentina's mass looting was called el saqueo – the sacking. That was politically significant because it was the very same word used to describe what that country's elites had done by selling off the country's national assets in flagrantly corrupt privatisation deals, hiding their money offshore, then passing on the bill to the people with a brutal austerity package.

They are just about lawless kids taking advantage of a situation to take what isn't theirs. And British society, Cameron tells us, abhors that kind of behaviour.

This is said in all seriousness. As if the massive bank bailouts never happened, followed by the defiant record bonuses. Followed by the emergency G8 and G20 meetings, when the leaders decided, collectively, not to do anything to punish the bankers for any of this, nor to do anything serious to prevent a similar crisis from happening again. Instead they would all go home to their respective countries and force sacrifices on the most vulnerable. They would do this by firing public sector workers, scapegoating teachers, closing libraries, upping tuition fees, rolling back union contracts, creating rush privatisations of public assets and decreasing pensions – mix the cocktail for where you live. And who is on television lecturing about the need to give up these "entitlements"? The bankers and hedge-fund managers, of course.

This is what Cameron got wrong: you can't cut police budgets at the same time as you cut everything else. Because when you rob people of what little they have, in order to protect the interests of those who have more than anyone deserves, you should expect resistance – whether organised protests or spontaneous looting. And that's not politics. It's physics.